Got to really try out the new gears today. Some highway travel between here and Moab, plus a couple trails. I have to say I'm really sorry I waited so long to do this. It was a PITA just to maintain speed on the highways around here, constantly shifting between 3-5 and having to plan ahead to get a run at hills. Now it just motors up in 5th gear, or drops to 4th gear on big hills.
On steep passes, it used to be 2nd gear most of the time, 3rd gear a little bit, and 1st gear to make it through tighter turns. Now, just 3rd gear and go.
In 4lo the difference is even more pronounced. Much easier to go slower, 1st gear engine braking on idle keeps the speed constant over obstacles where it would require careful 2 foot work before.
MPG on the dash display has gone up about 1.5 mpg, though based on error in each direction before/after it is probably about the same. Not that I really care about economy, but tank range is sometimes very important.